... steel, SUS201/304/316,Copper, aluminum, Titanium alloy steel, agate, glass, ceramic, Carbon steel, Chrome steel etc.Surface TreatmentZn-plating, Ni ... zinc-plated, blue black zinc-plated, rust preventive oil, titanium alloy galvanized, silver plating, plastic, electroplating, anodizing etc.ApplicationsAutomotive, instrument, ... certificate,and we hope to cooperate with you . Small Low Carbon Steel Balls